(5) باب فِي الْمَصَّةِ وَالْمَصَّتَيْنِ
Umm Fadl (Allah be pleased with her) reported Allah's Apostle (may peace be'apon him) having said this:
One or two sucklings do not make (the marriage) unlawful.
Reference: Sahih Muslim 1451 e
In-book reference: Book 17, Hadith 28
USC-MSA web (English) reference(deprecated numbering scheme): Book 8, Hadith 3419